(function(){var AjaxMonitor,Bar,DocumentMonitor,ElementMonitor,ElementTracker,EventLagMonitor,Evented,Events,NoTargetError,Pace,RequestIntercept,SOURCE_KEYS,Scaler,SocketRequestTracker,XHRRequestTracker,animation,avgAmplitude,bar,cancelAnimation,cancelAnimationFrame,defaultOptions,extend,extendNative,getFromDOM,getIntercept,handlePushState,ignoreStack,init,now,options,requestAnimationFrame,result,runAnimation,scalers,shouldIgnoreURL,shouldTrack,source,sources,uniScaler,_WebSocket,_XDomainRequest,_XMLHttpRequest,_i,_intercept,_len,_pushState,_ref,_ref1,_replaceState,__slice=[].slice,__hasProp={}.hasOwnProperty,__extends=function(child,parent){for(var key in parent){if(__hasProp.call(parent,key))child[key]=parent[key];}function ctor(){this.constructor=child;}ctor.prototype=parent.prototype;child.prototype=new ctor();child.__super__=parent.prototype;return child;},__indexOf=[].indexOf||function(item){for(var i=0,l=this.length;i<l;i++){if(i in this&&this[i]===item)return i;}return-1;};defaultOptions={catchupTime:100,initialRate:.03,minTime:250,ghostTime:100,maxProgressPerFrame:20,easeFactor:1.25,startOnPageLoad:true,restartOnPushState:true,restartOnRequestAfter:500,target:'body',elements:{checkInterval:100,selectors:['body']},eventLag:{minSamples:10,sampleCount:3,lagThreshold:3},ajax:{trackMethods:['GET'],trackWebSockets:true,ignoreURLs:[]}};now=function(){var _ref;return(_ref=typeof performance!=="undefined"&&performance!==null?typeof performance.now==="function"?performance.now():void 0:void 0)!=null?_ref:+(new Date);};requestAnimationFrame=window.requestAnimationFrame||window.mozRequestAnimationFrame||window.webkitRequestAnimationFrame||window.msRequestAnimationFrame;cancelAnimationFrame=window.cancelAnimationFrame||window.mozCancelAnimationFrame;if(requestAnimationFrame==null){requestAnimationFrame=function(fn){return setTimeout(fn,50);};cancelAnimationFrame=function(id){return clearTimeout(id);};}
runAnimation=function(fn){var last,tick;last=now();tick=function(){var diff;diff=now()-last;if(diff>=33){last=now();return fn(diff,function(){return requestAnimationFrame(tick);});}else{return setTimeout(tick,33-diff);}};return tick();};result=function(){var args,key,obj;obj=arguments[0],key=arguments[1],args=3<=arguments.length?__slice.call(arguments,2):[];if(typeof obj[key]==='function'){return obj[key].apply(obj,args);}else{return obj[key];}};extend=function(){var key,out,source,sources,val,_i,_len;out=arguments[0],sources=2<=arguments.length?__slice.call(arguments,1):[];for(_i=0,_len=sources.length;_i<_len;_i++){source=sources[_i];if(source){for(key in source){if(!__hasProp.call(source,key))continue;val=source[key];if((out[key]!=null)&&typeof out[key]==='object'&&(val!=null)&&typeof val==='object'){extend(out[key],val);}else{out[key]=val;}}}}
return out;};avgAmplitude=function(arr){var count,sum,v,_i,_len;sum=count=0;for(_i=0,_len=arr.length;_i<_len;_i++){v=arr[_i];sum+=Math.abs(v);count++;}
return sum/count;};getFromDOM=function(key,json){var data,e,el;if(key==null){key='options';}
if(json==null){json=true;}
el=document.querySelector("[data-pace-"+key+"]");if(!el){return;}
data=el.getAttribute("data-pace-"+key);if(!json){return data;}
try{return JSON.parse(data);}catch(_error){e=_error;return typeof console!=="undefined"&&console!==null?console.error("Error parsing inline pace options",e):void 0;}};Evented=(function(){function Evented(){}
Evented.prototype.on=function(event,handler,ctx,once){var _base;if(once==null){once=false;}
if(this.bindings==null){this.bindings={};}
if((_base=this.bindings)[event]==null){_base[event]=[];}
return this.bindings[event].push({handler:handler,ctx:ctx,once:once});};Evented.prototype.once=function(event,handler,ctx){return this.on(event,handler,ctx,true);};Evented.prototype.off=function(event,handler){var i,_ref,_results;if(((_ref=this.bindings)!=null?_ref[event]:void 0)==null){return;}
if(handler==null){return delete this.bindings[event];}else{i=0;_results=[];while(i<this.bindings[event].length){if(this.bindings[event][i].handler===handler){_results.push(this.bindings[event].splice(i,1));}else{_results.push(i++);}}
return _results;}};Evented.prototype.trigger=function(){var args,ctx,event,handler,i,once,_ref,_ref1,_results;event=arguments[0],args=2<=arguments.length?__slice.call(arguments,1):[];if((_ref=this.bindings)!=null?_ref[event]:void 0){i=0;_results=[];while(i<this.bindings[event].length){_ref1=this.bindings[event][i],handler=_ref1.handler,ctx=_ref1.ctx,once=_ref1.once;handler.apply(ctx!=null?ctx:this,args);if(once){_results.push(this.bindings[event].splice(i,1));}else{_results.push(i++);}}
return _results;}};return Evented;})();Pace=window.Pace||{};window.Pace=Pace;extend(Pace,Evented.prototype);options=Pace.options=extend({},defaultOptions,window.paceOptions,getFromDOM());_ref=['ajax','document','eventLag','elements'];for(_i=0,_len=_ref.length;_i<_len;_i++){source=_ref[_i];if(options[source]===true){options[source]=defaultOptions[source];}}
NoTargetError=(function(_super){__extends(NoTargetError,_super);function NoTargetError(){_ref1=NoTargetError.__super__.constructor.apply(this,arguments);return _ref1;}
return NoTargetError;})(Error);Bar=(function(){function Bar(){this.progress=0;}
Bar.prototype.getElement=function(){var targetElement;if(this.el==null){targetElement=document.querySelector(options.target);if(!targetElement){throw new NoTargetError;}
this.el=document.createElement('div');this.el.className="pace pace-active";document.body.className=document.body.className.replace(/pace-done/g,'');document.body.className+=' pace-running';this.el.innerHTML='<div class="pace-progress">\n  <div class="pace-progress-inner"></div>\n</div>\n<div class="pace-activity"></div>';if(targetElement.firstChild!=null){targetElement.insertBefore(this.el,targetElement.firstChild);}else{targetElement.appendChild(this.el);}}
return this.el;};Bar.prototype.finish=function(){var el;el=this.getElement();el.className=el.className.replace('pace-active','');el.className+=' pace-inactive';document.body.className=document.body.className.replace('pace-running','');return document.body.className+=' pace-done';};Bar.prototype.update=function(prog){this.progress=prog;return this.render();};Bar.prototype.destroy=function(){try{this.getElement().parentNode.removeChild(this.getElement());}catch(_error){NoTargetError=_error;}
return this.el=void 0;};Bar.prototype.render=function(){var el,key,progressStr,transform,_j,_len1,_ref2;if(document.querySelector(options.target)==null){return false;}
el=this.getElement();transform="translate3d("+this.progress+"%, 0, 0)";_ref2=['webkitTransform','msTransform','transform'];for(_j=0,_len1=_ref2.length;_j<_len1;_j++){key=_ref2[_j];el.children[0].style[key]=transform;}
if(!this.lastRenderedProgress||this.lastRenderedProgress|0!==this.progress|0){el.children[0].setAttribute('data-progress-text',""+(this.progress|0)+"%");if(this.progress>=100){progressStr='99';}else{progressStr=this.progress<10?"0":"";progressStr+=this.progress|0;}
el.children[0].setAttribute('data-progress',""+progressStr);}
return this.lastRenderedProgress=this.progress;};Bar.prototype.done=function(){return this.progress>=100;};return Bar;})();Events=(function(){function Events(){this.bindings={};}
Events.prototype.trigger=function(name,val){var binding,_j,_len1,_ref2,_results;if(this.bindings[name]!=null){_ref2=this.bindings[name];_results=[];for(_j=0,_len1=_ref2.length;_j<_len1;_j++){binding=_ref2[_j];_results.push(binding.call(this,val));}
return _results;}};Events.prototype.on=function(name,fn){var _base;if((_base=this.bindings)[name]==null){_base[name]=[];}
return this.bindings[name].push(fn);};return Events;})();_XMLHttpRequest=window.XMLHttpRequest;_XDomainRequest=window.XDomainRequest;_WebSocket=window.WebSocket;extendNative=function(to,from){var e,key,_results;_results=[];for(key in from.prototype){try{if((to[key]==null)&&typeof from[key]!=='function'){if(typeof Object.defineProperty==='function'){_results.push(Object.defineProperty(to,key,{get:function(){return from.prototype[key];},configurable:true,enumerable:true}));}else{_results.push(to[key]=from.prototype[key]);}}else{_results.push(void 0);}}catch(_error){e=_error;}}
return _results;};ignoreStack=[];Pace.ignore=function(){var args,fn,ret;fn=arguments[0],args=2<=arguments.length?__slice.call(arguments,1):[];ignoreStack.unshift('ignore');ret=fn.apply(null,args);ignoreStack.shift();return ret;};Pace.track=function(){var args,fn,ret;fn=arguments[0],args=2<=arguments.length?__slice.call(arguments,1):[];ignoreStack.unshift('track');ret=fn.apply(null,args);ignoreStack.shift();return ret;};shouldTrack=function(method){var _ref2;if(method==null){method='GET';}
if(ignoreStack[0]==='track'){return'force';}
if(!ignoreStack.length&&options.ajax){if(method==='socket'&&options.ajax.trackWebSockets){return true;}else if(_ref2=method.toUpperCase(),__indexOf.call(options.ajax.trackMethods,_ref2)>=0){return true;}}
return false;};RequestIntercept=(function(_super){__extends(RequestIntercept,_super);function RequestIntercept(){var monitorXHR,_this=this;RequestIntercept.__super__.constructor.apply(this,arguments);monitorXHR=function(req){var _open;_open=req.open;return req.open=function(type,url,async){if(shouldTrack(type)){_this.trigger('request',{type:type,url:url,request:req});}
return _open.apply(req,arguments);};};window.XMLHttpRequest=function(flags){var req;req=new _XMLHttpRequest(flags);monitorXHR(req);return req;};try{extendNative(window.XMLHttpRequest,_XMLHttpRequest);}catch(_error){}
if(_XDomainRequest!=null){window.XDomainRequest=function(){var req;req=new _XDomainRequest;monitorXHR(req);return req;};try{extendNative(window.XDomainRequest,_XDomainRequest);}catch(_error){}}
if((_WebSocket!=null)&&options.ajax.trackWebSockets){window.WebSocket=function(url,protocols){var req;if(protocols!=null){req=new _WebSocket(url,protocols);}else{req=new _WebSocket(url);}
if(shouldTrack('socket')){_this.trigger('request',{type:'socket',url:url,protocols:protocols,request:req});}
return req;};try{extendNative(window.WebSocket,_WebSocket);}catch(_error){}}}
return RequestIntercept;})(Events);_intercept=null;getIntercept=function(){if(_intercept==null){_intercept=new RequestIntercept;}
return _intercept;};shouldIgnoreURL=function(url){var pattern,_j,_len1,_ref2;_ref2=options.ajax.ignoreURLs;for(_j=0,_len1=_ref2.length;_j<_len1;_j++){pattern=_ref2[_j];if(typeof pattern==='string'){if(url.indexOf(pattern)!==-1){return true;}}else{if(pattern.test(url)){return true;}}}
return false;};getIntercept().on('request',function(_arg){var after,args,request,type,url;type=_arg.type,request=_arg.request,url=_arg.url;if(shouldIgnoreURL(url)){return;}
if(!Pace.running&&(options.restartOnRequestAfter!==false||shouldTrack(type)==='force')){args=arguments;after=options.restartOnRequestAfter||0;if(typeof after==='boolean'){after=0;}
return setTimeout(function(){var stillActive,_j,_len1,_ref2,_ref3,_results;if(type==='socket'){stillActive=request.readyState<2;}else{stillActive=(0<(_ref2=request.readyState)&&_ref2<4);}
if(stillActive){Pace.restart();_ref3=Pace.sources;_results=[];for(_j=0,_len1=_ref3.length;_j<_len1;_j++){source=_ref3[_j];if(source instanceof AjaxMonitor){source.watch.apply(source,args);break;}else{_results.push(void 0);}}
return _results;}},after);}});AjaxMonitor=(function(){function AjaxMonitor(){var _this=this;this.elements=[];getIntercept().on('request',function(){return _this.watch.apply(_this,arguments);});}
AjaxMonitor.prototype.watch=function(_arg){var request,tracker,type,url;type=_arg.type,request=_arg.request,url=_arg.url;if(shouldIgnoreURL(url)){return;}
if(type==='socket'){tracker=new SocketRequestTracker(request);}else{tracker=new XHRRequestTracker(request);}
return this.elements.push(tracker);};return AjaxMonitor;})();XHRRequestTracker=(function(){function XHRRequestTracker(request){var event,size,_j,_len1,_onreadystatechange,_ref2,_this=this;this.progress=0;if(window.ProgressEvent!=null){size=null;request.addEventListener('progress',function(evt){if(evt.lengthComputable){return _this.progress=100*evt.loaded/evt.total;}else{return _this.progress=_this.progress+(100-_this.progress)/2;}},false);_ref2=['load','abort','timeout','error'];for(_j=0,_len1=_ref2.length;_j<_len1;_j++){event=_ref2[_j];request.addEventListener(event,function(){return _this.progress=100;},false);}}else{_onreadystatechange=request.onreadystatechange;request.onreadystatechange=function(){var _ref3;if((_ref3=request.readyState)===0||_ref3===4){_this.progress=100;}else if(request.readyState===3){_this.progress=50;}
return typeof _onreadystatechange==="function"?_onreadystatechange.apply(null,arguments):void 0;};}}
return XHRRequestTracker;})();SocketRequestTracker=(function(){function SocketRequestTracker(request){var event,_j,_len1,_ref2,_this=this;this.progress=0;_ref2=['error','open'];for(_j=0,_len1=_ref2.length;_j<_len1;_j++){event=_ref2[_j];request.addEventListener(event,function(){return _this.progress=100;},false);}}
return SocketRequestTracker;})();ElementMonitor=(function(){function ElementMonitor(options){var selector,_j,_len1,_ref2;if(options==null){options={};}
this.elements=[];if(options.selectors==null){options.selectors=[];}
_ref2=options.selectors;for(_j=0,_len1=_ref2.length;_j<_len1;_j++){selector=_ref2[_j];this.elements.push(new ElementTracker(selector));}}
return ElementMonitor;})();ElementTracker=(function(){function ElementTracker(selector){this.selector=selector;this.progress=0;this.check();}
ElementTracker.prototype.check=function(){var _this=this;if(document.querySelector(this.selector)){return this.done();}else{return setTimeout((function(){return _this.check();}),options.elements.checkInterval);}};ElementTracker.prototype.done=function(){return this.progress=100;};return ElementTracker;})();DocumentMonitor=(function(){DocumentMonitor.prototype.states={loading:0,interactive:50,complete:100};function DocumentMonitor(){var _onreadystatechange,_ref2,_this=this;this.progress=(_ref2=this.states[document.readyState])!=null?_ref2:100;_onreadystatechange=document.onreadystatechange;document.onreadystatechange=function(){if(_this.states[document.readyState]!=null){_this.progress=_this.states[document.readyState];}
return typeof _onreadystatechange==="function"?_onreadystatechange.apply(null,arguments):void 0;};}
return DocumentMonitor;})();EventLagMonitor=(function(){function EventLagMonitor(){var avg,interval,last,points,samples,_this=this;this.progress=0;avg=0;samples=[];points=0;last=now();interval=setInterval(function(){var diff;diff=now()-last-50;last=now();samples.push(diff);if(samples.length>options.eventLag.sampleCount){samples.shift();}
avg=avgAmplitude(samples);if(++points>=options.eventLag.minSamples&&avg<options.eventLag.lagThreshold){_this.progress=100;return clearInterval(interval);}else{return _this.progress=100*(3/(avg+3));}},50);}
return EventLagMonitor;})();Scaler=(function(){function Scaler(source){this.source=source;this.last=this.sinceLastUpdate=0;this.rate=options.initialRate;this.catchup=0;this.progress=this.lastProgress=0;if(this.source!=null){this.progress=result(this.source,'progress');}}
Scaler.prototype.tick=function(frameTime,val){var scaling;if(val==null){val=result(this.source,'progress');}
if(val>=100){this.done=true;}
if(val===this.last){this.sinceLastUpdate+=frameTime;}else{if(this.sinceLastUpdate){this.rate=(val-this.last)/this.sinceLastUpdate;}
this.catchup=(val-this.progress)/options.catchupTime;this.sinceLastUpdate=0;this.last=val;}
if(val>this.progress){this.progress+=this.catchup*frameTime;}
scaling=1-Math.pow(this.progress/100,options.easeFactor);this.progress+=scaling*this.rate*frameTime;this.progress=Math.min(this.lastProgress+options.maxProgressPerFrame,this.progress);this.progress=Math.max(0,this.progress);this.progress=Math.min(100,this.progress);this.lastProgress=this.progress;return this.progress;};return Scaler;})();sources=null;scalers=null;bar=null;uniScaler=null;animation=null;cancelAnimation=null;Pace.running=false;handlePushState=function(){if(options.restartOnPushState){return Pace.restart();}};if(window.history.pushState!=null){_pushState=window.history.pushState;window.history.pushState=function(){handlePushState();return _pushState.apply(window.history,arguments);};}
if(window.history.replaceState!=null){_replaceState=window.history.replaceState;window.history.replaceState=function(){handlePushState();return _replaceState.apply(window.history,arguments);};}
SOURCE_KEYS={ajax:AjaxMonitor,elements:ElementMonitor,document:DocumentMonitor,eventLag:EventLagMonitor};(init=function(){var type,_j,_k,_len1,_len2,_ref2,_ref3,_ref4;Pace.sources=sources=[];_ref2=['ajax','elements','document','eventLag'];for(_j=0,_len1=_ref2.length;_j<_len1;_j++){type=_ref2[_j];if(options[type]!==false){sources.push(new SOURCE_KEYS[type](options[type]));}}
_ref4=(_ref3=options.extraSources)!=null?_ref3:[];for(_k=0,_len2=_ref4.length;_k<_len2;_k++){source=_ref4[_k];sources.push(new source(options));}
Pace.bar=bar=new Bar;scalers=[];return uniScaler=new Scaler;})();Pace.stop=function(){Pace.trigger('stop');Pace.running=false;bar.destroy();cancelAnimation=true;if(animation!=null){if(typeof cancelAnimationFrame==="function"){cancelAnimationFrame(animation);}
animation=null;}
return init();};Pace.restart=function(){Pace.trigger('restart');Pace.stop();return Pace.start();};Pace.go=function(){var start;Pace.running=true;bar.render();start=now();cancelAnimation=false;return animation=runAnimation(function(frameTime,enqueueNextFrame){var avg,count,done,element,elements,i,j,remaining,scaler,scalerList,sum,_j,_k,_len1,_len2,_ref2;remaining=100-bar.progress;count=sum=0;done=true;for(i=_j=0,_len1=sources.length;_j<_len1;i=++_j){source=sources[i];scalerList=scalers[i]!=null?scalers[i]:scalers[i]=[];elements=(_ref2=source.elements)!=null?_ref2:[source];for(j=_k=0,_len2=elements.length;_k<_len2;j=++_k){element=elements[j];scaler=scalerList[j]!=null?scalerList[j]:scalerList[j]=new Scaler(element);done&=scaler.done;if(scaler.done){continue;}
count++;sum+=scaler.tick(frameTime);}}
avg=sum/count;bar.update(uniScaler.tick(frameTime,avg));if(bar.done()||done||cancelAnimation){bar.update(100);Pace.trigger('done');return setTimeout(function(){bar.finish();Pace.running=false;return Pace.trigger('hide');},Math.max(options.ghostTime,Math.max(options.minTime-(now()-start),0)));}else{return enqueueNextFrame();}});};Pace.start=function(_options){extend(options,_options);Pace.running=true;try{bar.render();}catch(_error){NoTargetError=_error;}
if(!document.querySelector('.pace')){return setTimeout(Pace.start,50);}else{Pace.trigger('start');return Pace.go();}};if(typeof define==='function'&&define.amd){define(['pace'],function(){return Pace;});}else if(typeof exports==='object'){module.exports=Pace;}else{if(options.startOnPageLoad){Pace.start();}}}).call(this);